A rocket launcher might not be particularly impressive in his previous world, but in the world of One Piece, where the Navy was still using flintlock pistols, this thing could be quite formidable.
Starting from One Piece: Multiverse Simulation
Anime & Comics · Betek
He should go to Raikage.
Wait, hold on, I have an idea…
Ninja World: I Have a Life Simulator
Anime & Comics · Emik01
I don't see the reason to go to the future. If he had limited lifespan than yes he is needed in the future. But since he is immortal he could stayed with Toshi and study all knowledge that was lost and prepare for the future. When time is right he could have returned to Mandalore and save Ali. All he knows is that she disappeared, if he builds teleporter he could save her. And by that time he could also secretly build super high tech civilisation and prepare future plans.
And that force will also destroy the Earth.
"I will start running. The kinetic energy will give me unprecedented power and fortify my body, endlessly. On the first day, I'll be in extreme pain. On the second day, I'll be lost in darkness. On the third day, I'll die, but I will continue running. A month later, the power generated by kinetic energy will be complete. I will become a massive kinetic particle, unreasonably strong. I'll run for a year, two years, five years, ten years, until the future, when I will charge towards the aliens with the force of a supernova explosion."
DC: New Krypton (Omniverse)
Anime & Comics · Baph0met
If he didn't made it up then he knows why it was tradition to take such attack. If he did made it up now it will become a tradition.
It was merely a matter of not being accustomed to such a powerful impact, but now he was.
DC: New Krypton (Omniverse)
Anime & Comics · Baph0met
Now Yamato needs to upgrade its old armor to armor made of gundanium.
There for any sane ruler would grant any request that doesn't threaten kingdom existence.
"Very well, let us head over to the Adventurer's Guild and use the arena there to settle this.", I suggested.
Rising up from a Nobleman to Intergalactic Warlord!!
Anime & Comics · ManOfCultureLeon
Or if he wants to respect the low he could go to the queen and literally sad that he is disgusted with this kingdom where as soon as he leaves home his girlfriend is forced in to slavery and by low he can't do anything. So if things don't change he will leave. They cant do anything to him forcefully since he is only one who can repair lost items and if he can repair he can also sabotage it. He already has admin rights to their mos powerful ship I am sure there is remote and he can call it to do some chaos or self destruct right under palace.
"Very well, let us head over to the Adventurer's Guild and use the arena there to settle this.", I suggested.
Rising up from a Nobleman to Intergalactic Warlord!!
Anime & Comics · ManOfCultureLeon
And why not let house elf be the secret keeper? They could teleport away from danger are loyal (if treated well) and they could stay in the house most of the time and that would prevent any attacks.
Dumbledore relayed the information he had on the topic. "Yes, the minister wants to make it a monument so that it reminds other people that light always wins in the end. I tried to stop it but she was adamant. Getting a replacement house from the ministry will take time so we will have to consider other accommodations. We also need to change the ward used to protect your house since you can still be attacked. This recent attack proves that the Fidelius Charm is not sufficient."
Harry Potter and the Silent Guardian
Book&Literature · TalesByJaz